If it were ephemeral? Would that change this? Say recording the meeting locally a 5 minute frame then updating a meeting summary?

Do you mean ephemeral, or are you actually wondering about something implanted under the skin? I'd think/hope if it goes under the skin, it ends up in "hearing aid" territory. I'm less sure about if it doesn't persist.

it's more likely in cochlear implant territory (there are different laws and regulations for implants vs aids depending on locale)

Yup, typo, sorry